Way too much fiber in that diet -- you'll end up pooping a lot more and you'll probably also fart. If you stick to a meat-only diet then you will literally never fart.

Also, you might be able to get protein from plants, but you won't get protein with all the amino acids in the appropriate ratios unless you combine different plant sources, thereby increasing your overall calorie consumption because those additional amino acids will be accompanied with carbs if they are plant-based.

So you'll just end up under-nourished if you try to follow a plant-based diet. You may not end up obese, but you're not going be as strong and healthy as you would be if you ate only red meat.